Where does this casting process beat machining, forging, stamping or powder metallurgy, and where does it lose? We machine castings every day, so the answer comes from part geometry and volume, not from a sales sheet.
Most casting problems are process-selection problems. They surface after tooling is cut.
A shaft with one groove and a through bore does not need a wax pattern and a shell. You pay for tooling, then pay again for machining every critical feature back to size. Turned bar stock gets there in one setup.
As-cast surfaces typically sit far looser than a machined fit. If the drawing calls for a press fit or a sealing face, that face must be machined. Budgeting the machining after the casting quote is how a project goes over.
Forging improves grain flow, but it cannot form a closed internal channel. If the part needs a cored passage, the choice is casting or joining two pieces. Grain flow does not help you when the geometry is impossible.
Stamping dies are cheaper per part at volume, but the die itself is a fixed cost that has to be amortized. At a few hundred pieces the amortized die cost per part dwarfs the casting tooling. Volume decides this one.
Four questions settle most process decisions before any quote is written.
Investment casting handles undercuts, internal passages, varying wall thickness and tapered sections that a milling cutter cannot reach. A part that would need five setups and a custom fixture as a machined blank can often come off the casting line near net shape.
That advantage disappears on simple prismatic parts. If the geometry is mostly flat faces and drilled holes, machining from plate is faster and needs no pattern. We tell customers this before they spend money on tooling.
Machining holds the tightest tolerances of any process on this list. We work to ±0.005 mm on critical features and Ra 0.2–0.8 μm on finishes when the part calls for it. Casting alone will not reach that.
The practical route for most cast parts is cast near net shape, then machine only the functional faces. That keeps the geometry benefit of casting and the tolerance benefit of machining, and it cuts the amount of material you pay to remove.
Relative positions, not absolute limits. Your part geometry can move any row.
| Process | Best fit | Main trade-off |
|---|---|---|
| Investment casting | Complex shapes, internal passages, costly alloys | Needs a pattern; as-cast tolerance is loose |
| CNC machining | Tight tolerance, low to mid volume, simple geometry | Material waste high on complex shapes |
| Forging | High tensile and fatigue strength, no internal channels | Cannot form closed internal passages |
| Stamping | High volume, thin hard metal, flat or formed sheet | Die cost must be amortized over large runs |
| Die casting | High volume, non-ferrous, thin walls | Higher tooling cost; suited to long runs |
| Powder metallurgy | High volume, simple shapes, low tooling cost | Limited geometry; lower precision than machining |
One supplier for the casting, the machining and the surface treatment.
Silicone tooling for prototype and bridge volumes. Good for checking fit and form before hard tooling is cut.
Non-ferrous parts at higher volume. Thin walls and good as-cast surface, with higher tooling cost up front.
Sixteen simultaneous 5-axis centers for cast features that need to be brought to tolerance in one setup.
Mill-turn centers for cast parts with cylindrical features that would otherwise need a second operation.
Printed or machined prototypes to validate geometry before committing to a pattern.
Anodizing, plating, powder coating, bead blasting and laser marking on cast and machined parts.
| Item | Detail |
|---|---|
| Materials | Aluminium 6061, 7075, ADC12; stainless 304, 316L, 17-4PH; steel 1045, 4140; titanium TC4; Inconel |
| Maximum size | 4,000 mm maximum processing size on the machining side |
| Tolerance | ±0.005 mm (±0.0002 in) on machined features |
| Surface finish | Ra 1.6–3.2 μm as machined; Ra 0.2–0.8 μm on request |
| Inspection | 100% inspection before shipment; reports on request |
| Certifications | ISO 9001:2015, IATF 16949:2016, ISO 13485:2016, ISO 27001:2022 |
Since 2011. You do not coordinate a foundry and a machine shop separately, which is where most tolerance arguments start.
Sixteen simultaneous 5-axis centers, twelve 4-axis mills, twenty-seven 3-axis machines and sixteen mill-turn centers.
Quotation and free DFM analysis within 12 hours. We flag a casting-versus-machining mismatch before tooling is cut.
Production can start within 24 hours of a released order. Parts ship in 3–5 days on the machining side.
Raw material check, in-process monitoring and final inspection. Reports available on request.
From one prototype to 10,000+ part runs. Uploads are confidential and an NDA is available on request.
Housing and bracket parts where wall thickness varies and machining access is limited. IATF 16949:2016 applies to the process.
Small stainless and titanium components with internal geometry. Surface finish and traceability drive the process choice.
Low-volume structural parts in costly alloys, where material waste and weight both matter. Cast near net, then machine the interfaces.
Joint housings and link arms with cored passages and machined bores. Mill-turn handles the cylindrical features in one setup.
When the geometry has internal passages, undercuts or thin tapered walls that a cutter cannot reach without multiple setups and custom fixturing.
When the alloy is expensive, because casting removes far less material than cutting a part from a billet.
No. As-cast surfaces are looser than machined fits. If the drawing calls for a press fit, a bearing seat or a sealing face, that feature has to be machined.
On machined features we work to ±0.005 mm and Ra 0.2–0.8 μm. Plan the process as cast plus machined faces, not cast alone.
Forging gives better grain flow, so tensile and fatigue strength are higher ounce for ounce. Casting is quicker and cheaper to mass produce and generates much less waste.
If the part needs a closed internal channel, forging cannot form it. Strength numbers do not matter when the geometry is not achievable.
Stamping is faster and the dies last the life of the part, but the die is a fixed cost that must be spread over the run.
At a few hundred pieces that cost per part is high. Stamping suits high-volume, thin, hard metal parts. Casting gives more design freedom on thickness and taper.
Powder metallurgy has lower production and tooling cost than investment casting, which makes it good for high-volume simple shapes.
Casting is the better route when the part needs higher precision, more complex geometry, or is produced in low-volume runs.
Die casting gives smooth surfaces and thin walls but the tooling cost is higher, so it fits long production runs.
Sand casting is among the cheapest routes and suits large components where surface finish and tight tolerance are secondary.
No. Send the drawing or a 3D file and we return a quotation and free DFM analysis within 12 hours.
If the geometry would be cheaper to machine from solid, we say so before you commit to tooling.
There is no minimum order quantity. We run from a single prototype to 10,000+ part runs.
Uploads stay confidential and an NDA is available on request.
Quotation and free DFM analysis within 12 hours, with a straight answer on whether casting, machining or another route is cheaper for your part.
12-hour quote100% inspectionNo minimum order quantityNDA on request
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Upload your 3D model or 2D drawing and get a quotation with a free DFM analysis. Maximum processing size 4,000 mm.
CNC Metals 13 grades
CNC Plastics 10 grades
Machines & processes 12 options
Surface & post-processing 10 options
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